1615634616457 has 2 divisors, whose sum is σ = 1615634616458. Its totient is φ = 1615634616456.

The previous prime is 1615634616403. The next prime is 1615634616461. The reversal of 1615634616457 is 7546164365161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1585234601721 + 30400014736 = 1259061^2 + 174356^2 .

It is a cyclic number.

It is not a de Polignac number, because 1615634616457 - 2⁷ = 1615634616329 is a prime.

It is a super-2 number, since 2×1615634616457² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1615634616398 and 1615634616407.

It is not a weakly prime, because it can be changed into another prime (1615634614457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 807817308228 + 807817308229.

It is an arithmetic number, because the mean of its divisors is an integer number (807817308229).

Almost surely, 2^{1615634616457} is an apocalyptic number.

It is an amenable number.

1615634616457 is a deficient number, since it is larger than the sum of its proper divisors (1).

1615634616457 is an equidigital number, since it uses as much as digits as its factorization.

1615634616457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10886400, while the sum is 55.

The spelling of 1615634616457 in words is "one trillion, six hundred fifteen billion, six hundred thirty-four million, six hundred sixteen thousand, four hundred fifty-seven".